[Bug 237807] ZFS: ZVOL writes fast, ZVOL reads abysmal...

[Bob Friesenhahn]

On Fri, 9 Aug 2019, bugzilla-noreply at freebsd.org wrote:

> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237807
>
> --- Comment #10 from Nils Beyer <nbe at renzel.net> ---
> maybe I'm too supid, I don't know. I can't get the pool fast...
>
> Created the pool from scratch. Updated to latest 12-STABLE. But reads from that
> pool are still abysmal.

There may indeed be an underlying problem, but for this application 
you should be using simple mirrors rather than raidz1 with just 3 
disks each.

Bob
-- 
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
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